Burglar-alarm



(No Model.) 2 Sheets-Sheet 1.

I. L. SILVERBERG, M. REIGHMAN 8: G. TROXLER, Jr.

BURGLAR ALARM.

No. 468,444. Patented Feb. 9, 1892.

r WITNESSES: mvEwmRs:

BY W5C ATT'Y.

(No Model.) 2 Sheets-Sl1eet 2.

I. L. SILVERBERG, M. REICHMAN 81: G. TROXLER, Jr. BURGLAR ALARM.

INVENTUHS'- W BY 62 14 ,ATT'Y.

UNITED STATES PATENT OFFICE.

- ISAAC L. SILVERBERG, MOSES REICHMAN, AND GUSTAVUS TROXLER, JR, OF

NEiVARK, NEW JERSEY.

BU RG LAR-ALARM SPECIFICATION forming part of Letters Patent No.468,444, dated February 9, 1892.

Application filed October 1'7, 1891. Serial No. 409,029. (No model.)

To all whom it may concern.-

Be it known that we, ISAAC L. SILVERBERG, MosEs REIOHMAN, and GUSTAV'USTROXLER, J r., citizens of the United States, residing at 5 Newark, inthe county of Essex and State of New Jersey, have invented certain newand useful Improvements in Burglar-Alarm Attachments for ShadeRollers;and we do hereby declare the following to be a full, clear, and

r exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to letters of referencemarked thereon, I which form a part of this specification.

This invention relates to a burg1ar-alarm attachment for window-shaderollers; and it consists of certain arrangements and combinations ofparts, such as will be hereinafter more fully described and finallypointed out in the clauses of the claims.

In the drawings, Figure 1 is a front view of a window-frame and ashade-rollerprovided with our burglar-alarm attachment. Fig.

2 is a similar View of the upper and lower parts of the window-frame andcurtain, with the lower end of the curtain secured to a smooth pin inthe window-frame and the alarm set ready to ring the bell as soon as 0the ring at the bottom of the curtain is pushed from the pin in thewindow-frame. Fig. 3 is a vertical section of thelower part of thewindow-frame, taken on line a in Fig. 2, clearly illustrating the mannerof attaching 3 5 the ring on the curtain to the smooth pin in thewindow-frame. Fig. t is a full-sized view of the alarm which constitutesone of the brackets or supports for one end of the shaderoller. Fig. 5is a side view of the same.

0 Fig. 6 is a section taken on line y in Fig. at, clearly illustratingthe bracket portion in which the end of the shade roller is supported;also, a cam-plate secured to the end of the roller for vibrating ahammer which strikes the gong when the roller rotates in its bearings,and, further, a pawl pivoted to the bearing-plate,wvhich engages with anotch or stop in the cam-plate to hold the roller and the curtainsecured thereon in any desirable position. Fig. 7 is a similar viewillustrating the cam-plate in striking engagement with the bell-hammer,and the pawl being raised out of its engagement from the notch or stopin the cam-plate.

Similar letters of reference are employed to indicate correspondingparts in all the figures.

In the accompanying drawings, the letter A indicates the window-frame,to which are secured the ordinary pivot-bracket B and our burglar-alarmbracket 0, between which is arranged a spring-roller D. Thealarm-bracket G, in which the one end of the roller D rotates, consists,essentially, of a supporting-base 0, provided with screw-holes forsecuring it to the window-frame. Said base is provided with anupwardly-proj ectin g arm or bracket 0', having a journal-bearing 0 Theend of the roller D has attached thereon a cam-plate d, from whichextends a journal-pin d, which rotates in the bearin g 0 as will be seenfrom Figs. 1, 2, and 4. Upon said basec is pivoted by means of a pin orscrew 0 a hammer 0 having an upwardly-curved arm 0 with which the camend (1 of the cam-plate comes in contact when 5 the shade-roller rotatesin its bearings, and thereby causes said arm 0 and the hammer c tovibrate and strike against a gong 0, arranged on a post 0 on the base 0.The bracket 0 is provided with an upwardly-ex-' So tending portion 0having an arm c, extending out at a right angle therefrom, to which ispivoted a pawl e, the lower end 6' of which normally rests upon the edgeot' the cam-plate cl and can be made to engage with a notch or stop d011 said cam-plate to hold the roller and its curtain in any desiredposition, as will be seen from Fig. 6. By this construction the curtaincan be slowly raised and lowered, the cam gently striking the arm 1: ofthe 0 hammer and hardly causing a ring on the gong, and said pawl 6passes over said notch without interfering with the same, which,however, can be made to stop by slowly allowing the end 6' of the pawl eto drop into 5 said notch d in the manner of the ordinary pawls used onspring-rollers.

When it is desired to protect a window against the entrance of aburglar,the curtain is drawn down its full length, and a ring fin roo upper partof said arm 0 as shown in Figs. 4 and 7, and said pawl is then retainedin this position by placing a ring 6 on the end of the chain or ring (2*over a pin or hook a on the side of the window-frame, as will be evidentfrom Fig. 2. Now if a person raises the window and attempts to enter thecurtain will be pushed inward and the ringfdisengaged fromthe pin a inthe lower part of the window-frame. Owing to the raised position of thepawl e, the curtain will rapidly wind itself upon its spring-rolleruntil the end is reached, and the rapid revolutions of the cam cl causesthe hammer c and its arm of to vibrate very rapidly and to strike thegong in rapid succession with considerable noise to warn the occupantsof the building of the entrance of an unauthorized visitor.

The pinfis of such a construction that the least push against thecurtain will free the same and cause it to rise; or if itshould be cutacross its width by the person entering it will suddenly be wound up andcause .an alarm to be sounded on the gong.

Having thus described our invention, what we claim is- 1. Aburglar-alarm attachment for shade- -rollers, comprising therein ashade-roller rotating in a bearing on a bracket, an alarm on saidbracket, and a striking mechanism on said bracket, and means on the endof said roller for operating said strikingmechanism, substantially asand for the purposes set forth.

2. The combination, with a shade-roller, of a bracket provided with agong, and an arm on said bracket, having a hammer on one end, and a camon said shade-roller for vibrating said hammer, as and for the purposesset forth. 7

3. The combination, with a shade roller having a cam attached to one endand said cam being provided with a notch or stop, of a bracketconsisting, essentially, of a base and a gong thereon, a bracket-arm con said base, provided with an arm 0 and a pawl on said arm, adapted toengage with said notch or stop on the cam, substantially as and for thepurposes set forth.

4:. The combination, with a shade-roller having a camattached to one endand said cam being provided with a notch or stop, of a bracketconsisting, essentially, of a base and a gong thereon, a bracket-arm con said base, provided with an arm 0 and a pawl on said arm, adapted toengage with said notch or stop on the cam, a chainor string attached toone end of said pawl to raise the other end out of engagement with saidnotch or stop, and a pin on said arm 0 to limit the movement of saidpawl, as and for the purposes set forth. I

5. A burglar-alarm attachment for shaderollers, comprising therein ashade-roller rotating in a bearing on a bracket, an alarm on saidbracket, and a striking mechanism on said bracket, and means on the endof said roller for operating said striking mechanism, in combinationwith a fastening or holding device at the lower portion of thewindowframe, with which the lowered curtain or shade can be secured insliding holding engagement, substantially as and for the purposes setforth.

In testimony that we claim the invention set forth above we havehereunto set our hands this 15th day of October, 1891.

ISAAC L. SILVERBERG. MOSES REICI-IMABL GUSTAVUS TROXLER, JR.

lVitnesses: v

FREDK. O. FRAENTZEL, WM. H. CAMFIELD, Jr.

